Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Technical guidance manual for performing waste load allocations : Book VII : Permit averaging periods /
Other Authors
Author Title of a Work
Biswas, Hiranmay.
CORP Author Environmental Protection Agency, Washington, DC. Monitoring and Data Support Div.
Publisher Office of Water Regulations and Standards, Monitoring and Data Support Division, Monitoring Branch, U.S. Environmental Protection Agency,
Year Published 1984
Report Number EPA 440/4-84-023
Stock Number PB86-178951
OCLC Number 18189204
Subjects Water quality management--Mathematical models. ; Effluent quality--Mathematical models. ; Water--Pollution--Environmental aspects--Mathematical models. ; Hazardous substances--Environmental aspects--Mathematical models.
Additional Subjects Waste disposal ; Sewage disposal ; Streams ; Manuals ; Allocations ; Environmental impacts ; Licenses ; Sewage treatment ; Cost effectiveness ; Industrial wastes ; Mathematical models ; Steady state ; Stream flow ; Dilution ; Requirements ; Oxygen ; Dissolved gases ; Tables(Data) ; Concentration(Composition) ; Organic loading ; Secondary treatment
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
EHAD  EPA 440/4-84-023 Region 1 Library/Boston,MA 02/01/2016
EJBD ARCHIVE EPA 440-4-84-023 Headquarters Library/Washington,DC 05/16/2016
EJBD  EPA 440-4-84-023 Headquarters Library/Washington,DC 07/14/2017
ERAD  EPA 440/4-84-023 Region 9 Library/San Francisco,CA 01/07/1994
ESAD  EPA 440-4-84-023 Region 10 Library/Seattle,WA 03/23/2010
NTIS  PB86-178951 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 01/01/1988
Collation 1 volume (various pagings) : illustrations ; 28 cm
The conventional approach to developing Waste Load Allocations (WLAs) is based on a steady state analysis of stream conditions, using a design stream flow (usually the 7Q10) and a receiving water concentration (usually a water quality standard based on chronic criteria) for the pollutant to be allocated. An effluent concentration limit is computed for these conditions, and is used to establish the NPDFS permit conditions. The method used to evaluate the effect of permit averaging periods is based on a probabilistic dilution model (PDM) in which it is assumed that the stream flows, effluent flows and concentration are log-normally distributed and uncorrelated. The log-normal distribution is known to be representative of effluent behavior and to almost always under-estimate the lowest stream flows somewhat.
Includes bibliographical references (pages 6/1-6/2). Final report. "September 1984." "EPA-440/4-84-023, July 1984, Final"--Cover. "Water"--Cover. U.S. Environmental Protection Agency